The 400 Series offers high speeds as well as great quality. It is the most versatile of the Dremel series. The 300 Series is a precision tool. It is very compact and has several speeds to choose from. The Digital Rotary Dremel is very advanced. It features a LCD readout and an electronic feedback control. You can damage the drill and cause injury to yourself it you attempt to drill a larger hole then the drill is capable of completing. Always wear safety glasses or goggles when you operate any type of drill. Always unplug the drill before you change the bit in it. A drill is a very useful power tool is versatile enough to be used for a variety of projects. The line is meant to make power tools a more comfortable fit for women in the hopes of promoting safety and making them less intimidating. Bulky power tools are often hard for women to use. The first two power tools are in the works and even have names, Sandra Dee the Sander and Donna the Drill. Power tools for women that are designed to help them complete projects are anticipated to sell well. Some of us love the convenience of them, and we don t mind paying extra for it. Most of us don t miss the extra power either because we only use these power tools for home projects. Those who do large project on a regular basis prefer the heavy duty power tools with a cord. That is fine, that is why the market carries both. You really don t know the effect that is going to have on the operating capacity of the power tool. It is never a good idea to operate any type of power tool if you have been consuming alcohol. Your perception will be off and you could end up with a very serious injury. Some prescription medications and over the counter medications can made you groggy or sleepy as a side effect. It seems like saws are the one main power tool that hasn t yet been adapted for left handed individuals. For them, a table saw works best because you can choose to cut on either the right side or the left side of the blade. There are some great power tools on the market that can be used easily for left handed individuals including power screwdrivers, routers, nailers, drills, and sanders.